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Pampered-Z · 11-17-2008, 03:15 PM

Lingenfelter is good, But I would bet their numbers aren't going to match what some others are flowing that are hand porting and bench flowing. The one thing I don't like is that they don't provide flow numbers so you can't compare what their heads flow compared to others.

Couple other things:

Also note that if you want the heads finished, ie, removal of the CNC milling, that's an additional $300.

Also, those heads are set up for their cams, which are 550 lift. You're probably going with a bigger cam then that, then you need different springs, that and if they need to cut the heads for the springs, the price may go up a bit as well.

I had my heads done in 2000 by GTP, originally as stage IIs, When I decided to go faster I sent them back to have additioanl porting and larger exhaust valves. Haven't heard allot about him in recent years, not even sure his shop is still open? I did find this artical:

http://www.chevyhiperformance.com/te...ine/index.html

Honestly, I've compared on a bench my heads to a set of LEs and they are almost identical, Lyod appears to port a bit more on the roof of the track around the intake valve. Not sure how big a difference that might make in the flow numbers.

11-17-2008, 03:15 PM	#26
Pampered-Z Sliderule / Moderator Join Date: Oct 2004 Location: Catawissa PA Posts: 2,294 iTrader: (1)	Lingenfelter is good, But I would bet their numbers aren't going to match what some others are flowing that are hand porting and bench flowing. The one thing I don't like is that they don't provide flow numbers so you can't compare what their heads flow compared to others. Couple other things: Also note that if you want the heads finished, ie, removal of the CNC milling, that's an additional $300. Also, those heads are set up for their cams, which are 550 lift. You're probably going with a bigger cam then that, then you need different springs, that and if they need to cut the heads for the springs, the price may go up a bit as well. I had my heads done in 2000 by GTP, originally as stage IIs, When I decided to go faster I sent them back to have additioanl porting and larger exhaust valves. Haven't heard allot about him in recent years, not even sure his shop is still open? I did find this artical: http://www.chevyhiperformance.com/te...ine/index.html Honestly, I've compared on a bench my heads to a set of LEs and they are almost identical, Lyod appears to port a bit more on the roof of the track around the intake valve. Not sure how big a difference that might make in the flow numbers. __________________ 93Z M6 Black: The 385 Lives! Supercharged, 3-core front mount intercooler, GTP heads, 3:73's, Street twin clutch, Jethot Longtubes, Mufflex 4" catback/spintech, S+W cage, Spohn Suspenion, Yada Yada Yada 1) Build it 2) Race it 3) Break it 4) Repeat!!!